/* Enhanced Layout - OddCommon Redesign with Golden Ratio */

/* Navbar - Minimalist with Magnetic Effect */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: var(--spacing-xl) var(--spacing-2xl);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: var(--z-sticky);
  background: transparent;
  mix-blend-mode: difference;
}

.nav-links {
  display: flex;
  gap: var(--spacing-2xl);
}

.nav-links a {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: var(--font-weight-medium);
  color: #fff;
  opacity: 0.8;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: #fff;
  transition: width var(--transition-smooth);
}

.nav-links a:hover {
  opacity: 1;
}

.nav-links a:hover::after {
  width: 100%;
}

/* Active navigation state */
.nav-links a.active {
  opacity: 1;
}

.nav-links a.active::after {
  width: 100%;
  background: var(--accent-color);
  height: 2px;
}

/* Sections - Golden Ratio Spacing */
section {
  padding: var(--spacing-4xl) var(--spacing-2xl);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 1600px;
  margin: 0 auto;
}

/* Typography - Massive Scale */
h1 {
  font-size: clamp(4rem, 10vw, 9rem);
  line-height: 0.9;
  margin-bottom: var(--spacing-xl);
  letter-spacing: -0.04em;
  font-weight: var(--font-weight-black);
}

h2 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: var(--spacing-2xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: 1.5rem;
  opacity: 0.7;
  max-width: 600px;
  margin-bottom: var(--spacing-2xl);
  font-weight: var(--font-weight-normal);
  line-height: 1.4;
}

/* Cards - Clean Grid with Gradient Borders */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-2xl);
}

.card {
  background: transparent;
  padding: 0;
  border: none;
  border-top: 1px solid var(--border-color);
  border-radius: 0;
  padding-top: var(--spacing-xl);
  transition: border-color var(--transition-smooth);
  position: relative;
}

.card:hover {
  border-color: var(--border-hover);
}

.card h3 {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
  font-weight: var(--font-weight-bold);
}

.card-meta {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: var(--font-weight-medium);
}

/* Skills - Enhanced 4x4 Grid - OPTIMIZED FOR PERFORMANCE */
.skills-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.skill-card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: var(--spacing-sm) var(--spacing-lg);
  cursor: none;
  transition: background 0.25s ease,
              color 0.25s ease,
              border-color 0.25s ease,
              border-radius 0.25s ease,
              transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  will-change: transform;
}

.skill-card:hover {
  background: #fff;
  color: #000;
  border-color: #fff;
  transform: scale(1.05);
}

.skill-card.active {
  background: var(--surface-color);
  border-color: var(--border-hover);
  border-radius: var(--radius-xl);
  grid-column: 1 / -1;
  margin: var(--spacing-md) 0;
  padding: var(--spacing-xl);
  color: var(--text-color);
  transition: background 0.25s ease,
              color 0.25s ease,
              border-color 0.25s ease,
              border-radius 0.25s ease,
              padding 0.25s ease;
}

.skill-card.active:hover {
  background: var(--surface-color);
  color: var(--text-color);
  transform: none;
}

.skill-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: var(--font-weight-semibold);
  font-size: 1.1rem;
  width: 100%;
}

.skill-icon-emoji {
  font-size: 1.2rem;
  margin-right: var(--spacing-xs);
}

.skill-icon {
  font-weight: var(--font-weight-light);
  font-size: 1.5rem;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  display: none;
}

.skill-card.active .skill-icon {
  display: block;
  transform: rotate(45deg);
}

/* OPTIMIZED: Using CSS Grid for smooth height animation */
.skill-description {
  display: grid;
  grid-template-rows: 0fr;
  overflow: hidden;
  transition: grid-template-rows 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.3s ease,
              margin-top 0.3s ease;
  opacity: 0;
  will-change: grid-template-rows, opacity;
}

.skill-description > * {
  min-height: 0;
}

.skill-card.active .skill-description {
  grid-template-rows: 1fr;
  opacity: 1;
  margin-top: var(--spacing-lg);
}

.skill-description p {
  font-size: 1.1rem;
  opacity: 0.8;
  line-height: 1.6;
  margin: 0;
  color: var(--text-secondary);
}

/* Proficiency Indicators */
.skill-proficiency {
  display: flex;
  gap: 4px;
  margin-top: var(--spacing-xs);
  transition: opacity 0.3s ease;
}

.skill-card.active .skill-proficiency {
  opacity: 0.7;
}

/* Custom Cursor - Enhanced */
.custom-cursor {
  position: fixed;
  width: 8px;
  height: 8px;
  background: #fff;
  border-radius: 50%;
  pointer-events: none;
  z-index: var(--z-cursor);
  transform: translate(-50%, -50%);
  mix-blend-mode: difference;
  transition: width 0.3s ease, height 0.3s ease, background 0.3s ease;
}

.custom-cursor.hover {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid #fff;
}

.custom-cursor.click {
  width: 12px;
  height: 12px;
}

.custom-cursor-follower {
  display: none;
}

/* Scroll to Top Button */
.scroll-to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: none;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-smooth);
  z-index: var(--z-sticky);
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top:hover {
  
  section {
    padding: var(--spacing-3xl) var(--spacing-lg);
  }
}

@media (max-width: 768px) {
  .skills-container {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .nav-links {
    gap: var(--spacing-lg);
  }
  
  section {
    padding: var(--spacing-2xl) var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .skills-container {
    grid-template-columns: 1fr;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
}